[all variants] CUPS Blurry graphics with LP 2844-Z label printer

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I've been trying to get my LP 2844-Z shipping label printer (Z means that it uses the ZPL language) to work with two machines, one with Snow Leopard, and one with Mountain Lion.* Ubuntu should use the same CUPS (Common Unix Printing System), which is why I'm posting here. I set up the printer using the standard ZPL driver.* I am able to print a test page from CUPS at "localhost:631/" and the CUPS test page prints crystal clear text but the CUPS test image is a bit blurry.* Whenever I try to print any sort of image using OSX, I get very blurry images printed.*
I figured out the r
(Hardware)

I do not have a solution to your problem but I would suggest to point a browser to 127.0.0.1:631 and configure CUPS from that. You will inteact directly with CUPS and it is better for debugging. Now can you see your printer from there?

im running 12.04. I have a shinny new mfc-j8700 printer. I have the cups wrapper and the debian driver installed. I cant log into the web cups web interface and add the printer http://localhost:631/. however
when I print a test page, as far as I can tell the page looks like it is sent to the printer. the display on the printer lights up, but nothing prints.